Zhiwu Chang

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Grating and grating characteristic adjustment method and device
- Patent number 12,092,865
- Issue date Sep 17, 2024
- Huawei Technologies Co., Ltd.
- Shiyi Cao
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
POSITIONING AND ORIENTATION METHOD, APPARATUS, AND DEVICE
- Publication number 20240384993
- Publication date Nov 21, 2024
- Huawei Technologies Co., Ltd
- Dongyang Chen
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL FIBER RAW MATERIAL COMPOSITION, OPTICAL FIBER, AND OPTICAL...
- Publication number 20230275388
- Publication date Aug 31, 2023
- Huawei Technologies Co., Ltd
- Guanshi QIN
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
TUNABLE OPTICAL ADD/DROP MULTIPLEXER
- Publication number 20230231642
- Publication date Jul 20, 2023
- Huawei Technologies Co., Ltd
- Kui OUYANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL COMPONENT CONSTITUTING FIBER AMPLIFIER, FIBER AMPLIFIER, AN...
- Publication number 20230098573
- Publication date Mar 30, 2023
- Huawei Technologies Co., Ltd
- Shiyi CAO
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
GRATING AND GRATING CHARACTERISTIC ADJUSTMENT METHOD AND DEVICE
- Publication number 20230093290
- Publication date Mar 23, 2023
- Huawei Technologies Co., Ltd
- Shiyi Cao
- G02 - OPTICS